Global Patent Index - EP 1081846 A1

EP 1081846 A1 2001-03-07 - Voltage controled oscillator

Title (en)

Voltage controled oscillator

Title (de)

Spannungsgesteuerter Oszillator

Title (fr)

Oscillateur commandé en tension

Publication

EP 1081846 A1 (EN)

Application

EP 00306590 A

Priority

  • JP 24627799 A
  • JP 2000002736 A

Abstract (en)

Disclosed is a voltage controlled oscillator which is prevented from generating an abnormal oscillation signal and realizes reduction in the number of parts used including a large part, a smaller structure as a whole, and a lower manufacturing cost. This voltage controlled oscillator comprises: an oscillation transistor (11) which operates by common-base connection and outputs an oscillation signal from the emitter; an amplification transistor (12) which operates by common-emitter connection and whose base receives the oscillation signal; and a resonance circuit (2) connected to the collector of the oscillation transistor. In the resonance circuit, an inductor (21) for resonance is connected in a d.c. circuit provided between the collector of the oscillation transistor and the emitter of the amplification transistor, and a capacitor for resonance is connected between the collector of the oscillation transistor and an earth point. <IMAGE>

IPC 1-7 (main, further and additional classification)

H03B 5/12

IPC 8 full level (invention and additional information)

H03B 5/02 (2006.01); H03B 5/12 (2006.01); H03B 5/18 (2006.01); H03L 7/187 (2006.01); H03B 1/00 (2006.01); H03B 1/04 (2006.01)

CPC (invention and additional information)

H03B 5/1231 (2013.01); H03B 5/1203 (2013.01); H03B 5/1268 (2013.01); H03B 2201/0258 (2013.01); H03B 2202/07 (2013.01); H03B 2202/08 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FI FR SE

EPO simple patent family

EP 1081846 A1 20010307; EP 1081846 B1 20030521; CN 1147990 C 20040428; CN 1347194 A 20020501; DE 60002803 D1 20030626; DE 60002803 T2 20031224; JP 2001144534 A 20010525; JP 3742267 B2 20060201; KR 20010021460 A 20010315

INPADOC legal status


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2004-02-27 [ET] FR: TRANSLATION FILED

2003-08-26 [REG SE TRGR] TRANSLATION OF GRANTED EP PATENT

2003-06-26 [REF] CORRESPONDS TO:

- Document: DE 60002803 P 20030626

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